Unlock instant, AI-driven research and patent intelligence for your innovation.

Rotary velocity sensor and rotary position and velocity sensor

a technology of rotary velocity and position and velocity, applied in the field of sensors, can solve the problem of undesirable phase and achieve the effect of reducing the delay between actual and computed rotary velocity

Active Publication Date: 2011-05-03
DELPHI TECH INC +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This design improves the accuracy of computed rotary velocity, enhancing the performance of vehicle-controlled damping systems by accurately determining body height.

Problems solved by technology

It is noted that the differentiation process introduced undesirable noise and introduced an undesirable phase delay between the actual and computed rotary velocities.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotary velocity sensor and rotary position and velocity sensor
  • Rotary velocity sensor and rotary position and velocity sensor
  • Rotary velocity sensor and rotary position and velocity sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014]Referring now to the drawings, FIGS. 1-5 show an embodiment of the present invention. A first expression of the embodiment of FIGS. 1-5 is for a rotary velocity sensor 10 including a non-magnetic stator 12, a first coil 14, a non-magnetic rotor 16, and a first permanent magnet 18. The stator 12 has a central longitudinal axis 20. The first coil 14 is non-rotatably attached to the stator 12. The rotor 16 is substantially coaxially aligned with the central longitudinal axis 20, surrounds the first coil 14, and is rotatable with respect to the stator 12 about the central longitudinal axis 20. The first permanent magnet 18 is non-rotatably attached to the rotor 16.

[0015]In one implementation of the first expression of the embodiment of FIGS. 1-5, the first coil 14 has a central coil axis 22 aligned substantially perpendicular to the central longitudinal axis 20 of the stator 12. In one variation, the first permanent magnet 18 has a central flux axis 24 aligned substantially perpen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A rotary velocity sensor includes a stator having a coil and a rotor having a permanent magnet. The rotor is substantially coaxially aligned with the central longitudinal axis of the stator, surrounds the coil, and is rotatable with respect to the stator about the axis. A rotary position and velocity sensor includes a non-magnetic stator having a magnetosensitive device and having at least one coil and includes a non-magnetic rotor having at least one permanent magnet. The magnetosensitive device has a sensing surface with a normal axis aligned substantially perpendicular to the stator axis. The at-least-one coil has a central coil axis aligned substantially perpendicular to the stator axis. The rotor is substantially coaxially aligned with the central longitudinal axis of the stator, surrounds the at-least-one coil, and is rotatable with respect to the stator about the stator axis.

Description

TECHNICAL FIELD[0001]The present invention relates generally to sensors, and more particularly to a rotary (angular) velocity sensor and to a rotary (angular) position and velocity sensor.BACKGROUND OF THE INVENTION[0002]Conventional rotary (angular) position sensors include the analog angle encoder disclosed in U.S. Pat. No. 6,489,761. In the disclosed analog angle encoder, a magnetosensitive device, such as a Hall sensor, was embedded in a central post of a stator. The central post was surrounded by a rotor having a permanent magnet. The output from the magnetosensitive device varied sinusoidally with the rotary angular position of the central flux axis of the magnet with respect to a normal axis of the sensing surface of the magnetosensitive device.[0003]Rotary velocity was obtained in U.S. Pat. No. 6,489,761 by taking the time derivative of a sine / cosine resolver of the rotary angular position. It is noted that the differentiation process introduced undesirable noise and introdu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(United States)
IPC IPC(8): G01B7/30
CPCG01B7/30G01P3/46G01D5/2033G01D5/145
Inventor NEHL, THOMAS WOLFGANG
Owner DELPHI TECH INC